feat(ai): Phase 3A RAG 知识库 — CRUD API + Agent Tool + 向量知识源 + 前端管理页

- 知识库 REST API: 10 个端点 (references/guides CRUD + re-embed)
- search_medical_knowledge Agent Tool: 语义检索参考资料和临床指南
- VectorKnowledgeSource: 实现 KnowledgeSource trait，自动降级
- 沙箱配置: Patient/MedicalStaff 允许使用知识库检索
- 前端 AiKnowledgePage: Tabs(参考资料/临床指南) + Table + Modal CRUD
- 权限码 seed 迁移: ai.knowledge.list + ai.knowledge.manage + 菜单

apps/web/src/App.tsx

@@ -46,6 +46,7 @@ const AiPromptList = lazy(() => import('./pages/health/AiPromptList'));
 const AiAnalysisList = lazy(() => import('./pages/health/AiAnalysisList'));
 const AiUsageDashboard = lazy(() => import('./pages/health/AiUsageDashboard'));
 const AiConfigPage = lazy(() => import('./pages/health/AiConfigPage'));
+const AiKnowledgePage = lazy(() => import('./pages/health/AiKnowledgePage'));
 const AlertList = lazy(() => import('./pages/health/AlertList'));
 const AlertDashboard = lazy(() => import('./pages/health/AlertDashboard'));
 const AlertRuleList = lazy(() => import('./pages/health/AlertRuleList'));
@@ -255,7 +256,7 @@ export default function App() {
       "/health/follow-up-records", "/health/consultations",
       "/health/points-rules", "/health/points-products", "/health/points-orders",
       "/health/offline-events", "/health/ai-prompts", "/health/ai-analysis",
-      "/health/ai-usage", "/health/ai-config", "/health/alerts", "/health/alert-dashboard",
+      "/health/ai-usage", "/health/ai-config", "/health/ai-knowledge", "/health/alerts", "/health/alert-dashboard",
       "/health/alert-rules", "/health/devices", "/health/realtime-monitor",
       "/health/oauth-clients", "/health/dialysis", "/health/action-inbox",
       "/health/follow-up-templates", "/health/care-plans", "/health/shifts",
@@ -327,6 +328,7 @@ export default function App() {
                       <Route path="/health/ai-analysis" element={<AiAnalysisList />} />
                       <Route path="/health/ai-usage" element={<AiUsageDashboard />} />
                       <Route path="/health/ai-config" element={<AiConfigPage />} />
+                      <Route path="/health/ai-knowledge" element={<AiKnowledgePage />} />
                       <Route path="/health/alerts" element={<AlertList />} />
                       <Route path="/health/alert-dashboard" element={<AlertDashboard />} />
                       <Route path="/health/alert-rules" element={<AlertRuleList />} />